{"product_id":"motorad-5523-187-engine-coolant-thermostat","title":"Motorad 5523-187 Engine Coolant Thermostat","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eMotorad UltraStat 5523-187 is an engine coolant thermostat built for broad GM and Isuzu fitment, including Chevrolet Silverado, GMC Sierra, and Chevrolet Express applications. It uses stainless steel construction and an OEM-style design to support consistent coolant flow control in demanding cooling systems.\u003c\/p\u003e\u003cp\u003eThis thermostat is a fitment-based replacement for many Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD applications, along with other trucks, vans, and SUVs listed below. The 5523-187 part number is also referenced as 187-3255 for the same application.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStainless steel construction for corrosion resistance and long service life\u003c\/li\u003e\n\u003cli\u003eUltraStat design with OEM-grade fit and function\u003c\/li\u003e\n\u003cli\u003eStarts to open at 187 degrees Fahrenheit\u003c\/li\u003e\n\u003cli\u003eJiggle pin weep hole for air bleeding during cooling system service\u003c\/li\u003e\n\u003cli\u003eO-ring seal style with included seal material specified in the product data\u003c\/li\u003e\n\u003cli\u003eCompatible with a wide range of Chevrolet, GMC, Cadillac, Isuzu, Hummer, Saab, and Mitsubishi Fuso applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eMotorad UltraStat 5523-187 is an engine coolant thermostat engineered for direct replacement use in many GM truck, SUV, van, and performance applications. The stainless steel body and OEM-grade design support stable temperature regulation, while the 187-degree opening point helps maintain proper operating temperature once the engine reaches its target range. This thermostat is listed for Chevrolet Silverado, GMC Sierra, and Chevrolet Express platforms, as well as Cadillac Escalade, Chevrolet Tahoe, and GMC Yukon applications.\u003c\/p\u003e\u003cp\u003eThe UltraStat line focuses on durable thermostat construction and controlled coolant response. According to Motorad, the stainless steel build provides corrosion resistance, and the BLVT valve technology is used to reduce thermal shock to cooling system components. The 5523-187 part number should be matched to the exact fitment shown for your vehicle.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEngine running too cool or too warm\u003c\/li\u003e\n\u003cli\u003eDelayed coolant temperature stabilization after startup\u003c\/li\u003e\n\u003cli\u003eTemperature fluctuation caused by a worn thermostat\u003c\/li\u003e\n\u003cli\u003eCooling system stress from abrupt temperature changes\u003c\/li\u003e\n\u003cli\u003eCorrosion-related thermostat wear in the cooling circuit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify the thermostat housing style and application before installation. This part uses an O-ring seal and the product data indicates a gasket or seal is required and included. No installation tool is included. Confirm the 187-degree opening specification and match the 5523-187 part number to the vehicle listing before service.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eMotorad UltraStat thermostats are built with heavy-gauge stainless steel construction and BLVT valve technology for controlled cooling-system response. The 5523-187 part number is cataloged for the listed applications and cross-references 187-3255 for the same application.\u003c\/p\u003e","brand":"Motorad","offers":[{"title":"Default Title","offer_id":53396524826805,"sku":"BFNG-5523-187","price":45.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/TZ_5523187_Fro.jpg?v=1790665675","url":"https:\/\/www.partcatalog.com\/products\/motorad-5523-187-engine-coolant-thermostat","provider":"PartCatalog","version":"1.0","type":"link"}